Hello,dear

Well, it will not affect much ,upto 12'th there is nothing so much programing languages , but in btech your have to study programming language from the basic but if you pursue btech you have to study hard, so don't worry , you will study from basic in btech all about computer to a large extent,it doesn't affect much , but you will find many students knows few languages from 12'th ,but you can cover up those all if you work hard. All the best

Hope this will help you!!

Hi

Yes definitly you can join Computer science engineering. You will be taught about computers right from scratch. Dont worry everyting will be taught to you. In the first year there will be a subject called as Introduction to Information technology. In this subject you will be introduced about computer artitecture, algorithms, programming, C, etc.

You should learn programming lanuages when you opt computer science stream like C,C++,Java, Python. Colleges will also teach these subjects from beginning. you have daily practice programming with the class lecture. Then the computer science subject will be simple for you